Mechanical interrupter for electric ignition systems.



G. 1101101111. -ISIIIKEHANIL'ML INTBRRUPTER FOR ELECTRIC IGNITIONSYSTEMS.

APPLICATION FILED APB- 9, 1912.

' Patented Aug. 19, 1913.

2 SHEETS-SHEET 1.

I VJITNEBSES G. HONOLD. MECHANICAL INTERBUPTER r011 ELECTRIC IGNITIONSYSTEMS.

APPLICATION mum 2.9, 1912.

Patented Aug. 19, 1913.

2 SHBBTS8HEET 2.

ITL-

MTN E5555 UNITED STATES V PATENT OFFICE.

GOTTLOB 'HONOLD, OF STUTTGART, GERMANY, ASSIGNOR TO THE FIRM F ROBERT vBOSCH, OF STUTTGART, GERMANY.

7 EC ANICAL INTERRUPLLER on ELECTRIQIGNiTION SYSTEMS? To all. who-1n it.mayconcern:-

Be it knonn-th'at-I, 'Go'rrwn' Hononn, a subject of the Emperor ofGermany,"arid re-- siding at Stuttgart, Germany ha've invented 5certaiii "new 'and useful Improvements in Mechanical InterruptersforElectrie Ignition Systems; and l do hereby-declare-the following tobe a full, clear; and exactde scription of the invention, such. as willen-' able others skilled in the art'io which *it appertains-to-make anduse the sam'c.i A .-The present invention relates tomeehanlcal'interruters for electric ignition systems for interna combustion, engines andparticularly-to en interrupter of'simple andeflec- -'tiveorganiz'ationhaving-one' of its coopr'ative interrupter contacts mountedupona de formable carrier? which is 'periodically def or'medin-such mann'a's tofsep reto t-he 20. contacts" It has heretpfore'been-thepraetiee nthe construction of mechanical mterruptersto z'mount theimovable contactterminal fupon free end i of a. -pivotedlever pressed; by

thefree end of a blade 'gri po i-he: spring" toward" tl1'e--circ1iitc1osm'g os' itio'nj;

and-to errange suitable cams or; projectionsin Siich-inanneras to;periodically-engage and shifttlie' .hlade sprinorlev'er' 'to-sepa-rat'e'- t-he contect termina s. ai'ral'i'g ment has*the' disadvantagethat the free eo relativelyto the: cooperative cont'hctl'by fan?actuating cam'a'cting directly 'u'ponftlie' cur tier against spring'pressure, whereby the disturbin vibrations are avoided 'and faslight'mo'vernent-of one og'bo'th' of the ends of the earrier efi'ects;e, com 'arativel widend y the" term; able' cerrier comprises an archedspring-fes I teri'ed [at oneiend' to -the rotatable member 4 T of theinterrupter and having its other end ettaehed to a'u'n'ovable blockwhich' is riv-odice'lly moved towardme fixed end 0 the eerrie'r by. Zenactuating cam, thereby moving the interrupter contact mountedjo'n theearner intermediate *0? the -fends Specification of I ctters ram. r p tt 19, 191 Application filed April 9, 1912. Serial No. 689,548.

away from the cooperative contact mounted 'on the rotatable-member. inthis way the movable contact may be mounted sons to be free from theundesirable oscillatory etl'ects, even at high rotative speeds, whilethe construction is simple and the operzition thoroughly-reliable.

In the accompanying drawings, illustrating preferred forms of myinvention, Figure 1 is'a. plan view, and Fig. 2 is a' longitudinal isa-planvieiv, and Fig. 4 is a side view ut a' modification within theinvention.

,inountedinlhe ordinary \vay .upon the end of the shaft of'an: electricignition machine '1', .for example, :and' has a'lugg on one side findradial guides-h =11, on the-opposite side. The:deformfiblecarrierfcomprises :the axia'lly -larched spr in g (and thefiber block" f. The-llspringeiis attached at one end to the rotateblemember aby the pine; and atthe --'othei"end tothe bloc'lcf by' the pinthese pins preferably. lying in planes parallel to the pla 'ieffofrotation fand allowing the 'ingto move slightly-there around duringai'rai' 'ged to slideradially between the "gin-ides 7;} and. to-proj'ectinto the path of the actuating-camfand is prevented from axial fi ve ntbizfl e s n 'p d' Plate i as by jit-h" rdtatabl'e; in en'ibera within"the plug k of insulating" {material- "and; is preferably is" cai'1'ied 3by the rch'edjs' pring' gintermediate the ends a nd is' normally held bythe spring 'cams'lm are arrangedwit-hin the housing '11 in-tliepath ofrotation .of the projecting end of the block f. The housing n inay'be'angulzirly ad'usted by means of the lever p to adjust tile. period'of ignition in the wellknown manner." Whenthe interrupter disk id-isrotated, the block f of the carrier periodicall'y. engages the actuatingcams'm' and is directly moved inwardly toward the end of thespringfastened at e. In this period of :ictuation the spring 6 isdeformed against its pressure and the relatively movableinternipter-contact d is moved axially away from the cooperative contactI) to interrupt section thereof on-line 22 of Fig. 1; Figs? jt jperi odof deformation The block f is 'interriipter contact b iscarriedthe usuiil way. The co-.

in properengagement with I) to efl'eet good electrical contact at falltimes, even at high rotatzi ve'gjspeeds. "One or. inorc' actuating f InFigsglvand 2', the interrupter.dislg 'mis the electric circuit at thispoint with a quick and comparatively wide break.--

The' construction shown irr Figs. 3 and 4 is similar to that previously'described with the exception that the spring 0 is arched in a radialdirection instead of in an, axial direction, and the ins e e are setaxially, while the plug k 0? Figs. 1 and 2 carrying the contact 6 isreplaced by the plug 1 fastened,to and insulated from the interrupterdisk 0. Furthermore, the guide h in Figs. 3 and 4 completely surroundstheblock f so that the spring-pressed plate 2' of the previousconstruction is not required in this case. The method of operation ofthis embodiment of my invention will be readily apparent from above.

Although I have shown normally stationary actuating cams 6., cams whichare stationary except during adjustment) and rotatable interrupterparts, it will be readily understood that this arrangement may bereversed if desired. So also, the actioneom sequent upon theengagement-of the cam and the deformable carrier may be utilized tobring the interrupter contacts together instead of separating them, andthey may.

be separated or brought together by simultaneous engagement withact-uating cams on both ends. Having I claim is: J L 1. In a rotatablemechanical interrupter for electric ignition systems, a pair of cobothends against vibration and carrying one of said 'contacts, and anactu'atin cam having a radially actuating surfacea apted. to deform saidcarrier radiall 'upon engagement there-with and there y separate saidcontacts in an axial-direction.

Copies of this patent may be obtained for the cents each, by addressingthe Commissioner of Patents,

tron and carrying sa1d contacts, an

bring the ends of tEe together and thereby separate said contacts thusdescribed my inventiomwhat' 3. In a mechanical interrupter for electricignition systems, a pair of cooperative interrupter contacts, adeformable carrier carrying between its ends one of said contacts, and acam adapted tomove the ends of the carrier more nearly together uponengagement therewith and. thereby separate said contacts with a quickand comparatively -wide break.

4. In a mechanical interrupter for electric ignition system s,a pair ofcooperative interrupter contacts, a-rotatablemember carrying one of saidcontacts,a deformable carrier attached at one end to said member andcontacts, a normally'stationary cam adapted to deform said carrier uponengagement with the other end thereof and thereby separate said'contactswith a quick and comparatiyely-wide break,

5. Ina rotatable mechanical interrupter for electric ignition systems, apair of cooperative interrupter contacts, an arched spring steadied atboth'ends againstlvibrae J between its ends-one of an actuating camhaving a radially actuatin surface adapted to spring more nearly with aquick and comparatively wide break. 6.; In a mechanical interrupterforelectric ignition systems, an interrupter 'disk, an arched springattached atone end to said disk, aninterruptercontactmounted on saiddisk, an axially disposedcotiperative interrupter contact mounted onsaid spring intermediate the ends thereof, a radially movable blockfastened to the other .end ofhsaid spring, guides on said member forsaid block, and an actuatingcam projecting within the path of said blockto engage it 1 p f a and bring the ends" of said spring more nearlytogether and thereb separate said contacts with a quick andcomparatively wide break.

In testimon whereof I afiix my signature, in presenceo two witnesses.

1 GOTTLOB-H NOLD.v Witnesses: V Q

Max Ansonfi'rz, PAUL'WOLFART.

' Washington, D1 0.

(35 carrying between its ends the other of said

